信使核糖核酸 xìnshǐhétánghésuān messenger RNA Origin Definitions Defs Strokes Stroke Words Sentences Sents 信使 xìnshǐ noun messenger a person who carries a message, delivers mail, or performs a specific mission; courier核糖核酸 hétánghésuān RNA ribonucleic acid; a type of nucleic acid found in all living cells that is involved in the synthesis of proteins